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Finding the Fourth Proportional to 123,599.20, 185,355.60 and 64,415.20

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Solution

The fourth proportional to 123,599.20, 185,355.60 and 64,415.20 is: 96,600.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,599.20 : 185,355.60 = 64,415.20 : x
  2. Step 2: Convert to fraction form
    123,599.20/185,355.60 = 64,415.20/x
  3. Step 3: Cross multiply
    123,599.20x = 185,355.60 × 64,415.20
  4. Step 4: Simplify right side
    123,599.20x = 11,939,718,045.12
  5. Step 5: Solve for x
    x = 11,939,718,045.12/123,599.20
  6. Step 6: Final answer
    x = 96,600.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.